A + 相当于 + B
The verb 相当于 (xiāngdāngyú) means "to be equivalent to" or "to amount to," used for drawing comparisons between quantities or degrees. It links two things of comparable scale or value. For example, 相当于一年的降雨量 means "equivalent to a year's rainfall."
这笔奖金相当于他三个月的工资。
Zhè bǐ jiǎngjīn xiāngdāng yú tā sān gè yuè de gōngzī.
This bonus is equivalent to three months of his salary.
这座桥的长度相当于五十个足球场。
Zhè zuò qiáo de chángdù xiāngdāng yú wǔshí gè zúqiú chǎng.
The length of this bridge is equivalent to fifty football fields.
今天走的路相当于跑了一个半程马拉松。
Jīntiān zǒu de lù xiāngdāng yú pǎo le yí gè bànchéng mǎlāsōng.
The distance walked today is equivalent to running a half marathon.